<template>
    <div class="app">
      <h3>我是APP组件</h3>
      <ChildVue />
    </div>
</template>

<script>
  import ChildVue from './components/Child';
  export default {
    name:'App',
    components:{ChildVue}
  }
</script>

<style>
  .app{
    background-color: gray;
    padding: 10px;
  }
</style>